<style>
  #search_form {
			width: 250px;
            height: 28px;
			display: inline-block;
			position: relative;
			padding: 0px;
		}
		
		#search_form>input {
			    border-radius: 50px;
			    width: 250px;
                height: 28px;
			    display: inline-block;
			    text-indent: 10px;
			    background: #f8f9fa;
			    color: #748290;
			    border: 1px solid #23b27e;
			    padding: 2px !important;
			    font-size: 12.5px;
			    margin-top: 0px;
			    outline: 0;
		}
		
		#search_form>input:focus {
			background-color: #f0f3f5;
		}
		
		#search_form>input::-webkit-input-placeholder {
			color: #23b27e;
		}
		
		#search_form>span.icon-search {
			position: absolute;
			left: 225px;
			top: 2px;
			line-height: 25px;
		}

</style>
<form action="<?php echo url('search');?>" id="search_form">
<input type="text" placeholder="输入关键词 按回车键搜索" name="keyword">
<span class="icon-search text-qimeng-search"></span>
</form>

